Bark-peeling machine



L .Tu nu e h S s #u e e h s 2 Patented Nov. 16,1897.

J'. T. 8p G. W. JONES BARK FEELING MACHINE.

(No Model.)

(No Model.) Y 2 sheetssheet 2. J. T. 8v G'. W. JONES. BARR FEELING MACHINE.

No. 593,897. Patented Nov. 16,1897.

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UNITED STATES PATENT l OFFICE.

JOHN T. JONES AND GEORGE JONES, OF WESTERN PORT, MARYLAND.

BARK-PEELING MACHINE.

SPECIFICATION forming part vof Letters Patent No. 593,897, dated November 16, 1897.

l Application-Eleni January 28, 1897. Serial No. 621,042. (No model.)

To @ZZ whom it may concern:

Be it known that we, JOHN T. JONES and GEORGE W. JONES, of Western Port,'in the county ofAllegany and State of Maryland, have invented a new and useful Improvement in Bark-Peeling Machines, of which the following is a specification.

Our invention is Ain the nature of an improved machine for peeling or cutting the 1o bark from logs preparatory to cutting up said logs into chips in the manufacture of wood-` pulp for paper-making. Machines for doing this work have heretofore been invented; but the difficulty heretofore experienced is that the machines for doing this work either cut away and lwaste a considerable portion of the wood or else work so very slowly as to have no advantage over hand-peeling. Our invention is designed toaccomplish the work very zo rapidly and expeditiously and at the same time toavoid any wasteful cutting of the -wood fibers; and to this end it consists in anA improved construction and arrangement of parts, which we will now proceed to fully de- I z5 scribe with reference. to` the drawings, in

- which- Figure 1 is a vertical'cross-section through the machine. Fig. 2 is a vertical longitudinal section of one end of the machine; Fig.

i 3o. 3, a plan or top view, and Fig. 4 a sectional detail, of one of the cutter-heads.

In the drawings, Fig. l, A A A2 represent a strong framework, to the outer ends of which on the middle line are attached upright 3 3 5 bars or standards A2, which extend from the lower frame-bar A to a point some distance abovethe upper horizontal frame-bar A2. Between these standards A3 and extending from one end to the other of the machine h 4o there is arranged a horizontal log-table B,

w"5"o"arranged parallel to each other shafts B8 B8.

These shafts have at each end small toothed wheels B B', upon which the log rests and by which the log is slowly rotated while the bark is being cut off. There is one pair of these wheels near one end of the machine and anothervpair near the other end, and as the log only bears upon vthese four wheels the log, veven if it be crooked, will always find' a bearing thereon and berotated thereby. To give rotary motion to these wheels and shafts, the latter are extended at their ends beyond the framework and have sprocket-wheels B2 xed to them, and with these sprocket-wheels there engages at each end of the machine an endless chain belt B4, which also passes around a lower sprocket-wheel B3 on a shaft B7 near the bottom ofthe machine and also an upper sprocket-wheel B5 on a shaft B6, journaled in bearings in the top of the end standards A3. This shaft B6 has a loose and tight pulleyP P,`so that a drive-belt may be shifted from one to the other, according asit is desired to rotate the log or hold it still. These two pulleys P P.' are shown in Fig. 2 inside the framework, but they may be placed at any convenient place either inside or outside the framework.

As the log is turned its-bark is stripped off vby two series of cutter-heads D (see Fig. 3) onl opposite sides of the middle line, one series of cutter-heads alternating with the other series, so that one series of cutter-heads takes off a series of rings of bark and the other seriesA strips the intervening portion, so that a single revolution of the log about its longitudinal axis causes it to be entirely stripped of its bark. Each of the cutter-heads is arranged to revolve in a separate frame D', which about its middle is hung loosely upon a horizontal shaft D2. A band-pulley cl2 is rigidly fixed to this shaft D2 within each frame D', and aband d connects it with a smaller band-pulley d, fixed to the side of each cutter-head, so that the rotation of the shaft D2 is made to impart a rapid rotation to each of Vthe cutter-heads,

while each cutter-head and its frame is adapted to rise and fall independent of the rest, ac-

cording to the inequalities or curves of the A log. To hold the cutter-heads against the log IOO To impart -motion to the shafts D2 that drive the cutter-heads, a band-pulley D7 (see Fig. 3) is fixed upon one of said shafts, and the two shafts D2 D2 are connected together for a reversed rotation by band-pulleys D5 D5 on the ends of the same and a crossed belt DG. This gives a reversed rotation to the series of cutter-heads on opposite sides of the log and secures an important result, in that the pull of one set of cutter-heads en the log is neutralized by that of the other set. If the pull of all the cutter-heads on the log were in the same direction and acting at the same time, it would interfere with the action of the logturning devices to such an extent as to prelvent the latter from acting properly and would also cause the chips of one set of cutter-heads to clog and impair the action of the other cutter-head.

To raise and lower the log-table, the screwrods O are turned within the nuts l) on the extension ofthe table, and this rotation of these rods is effected through a bevel-gear c c2 at each end of the machine, the bevel-gears c being on the upper ends of the screw-rods O, while the intermeshin g bevel-gears f;2 are upon the ends of a horizontal shaft OQ which may be turned either by hand or by machinery through a tight and loose pulley. As the logtable is raised and lowered it will be seen (see Fig. l) that the log-turning sprocket-wheels Bzrse and fallwitllin the chain belts Bwhich still maintain their engagement with the said sprocket-wheels.

To make use of our invention the log-table B is lowered toits lowest position and the log from suitable skids or log-rolling devices is rolled sidewise over the toothed wheels B on that side, and the table is then raised until the log is brought into contact with the eutter-heads above, and as the logis turned axiallyin contact with the cutter-heads the bark is quickly and perfectly stripped therefrom without waste of wood.

In constructing the cutter-heads (see Fig. el) the knives 7tare arranged diagonally, and one side of the cutter-head is concaved or hollowcd out at L2 and is made to communicate with the throats 7e in front of the knives, so that the chips of bark that pass into the throats have a lateral clearance from the cutter-heads.

Having thus described ou r invention, what we claim as new, and desire to secure by Letters Patent, is-

l. rlhe combination with cutter-heads arranged above the log; of a subjacent log-supporting table, turning devices consisting of a horizontal shaft on each side of the table provided with supporting-wheels and sprocketwheels on their ends, an endless chain belt passing around said sprocket-wheels, and distending and actuating wheels for the chain belt one arranged above and the other below the log-table, and means for adjusting the table and its turning devices vertically substantially as and for the purpose described.

2. The combination with cutter-heads arranged above the log; of a subjaeent log-supporting table, turning devices consisting of a horizontal shaft on each side of the table provided with supporting-wheels and sprocketwheels on their ends, endless chain belts passing around said sprocket-wheels, distending and actuating devices for the chain belt, and a vertical adjusting-screw at each end of the table in mesh with nuts on the ends of the table and arranged to adjust the latter vertically substantially as and for the purpose described.

3. In a bark-peeling machine the combination of the main frame having slotted end standards A3; of a log-table provided with supporting and turning devices consisting of shafts B8 B8, wheels B B2, and chain belt Il", and also a screw-nut l) at its ends, the screwrods O, bevel-gears c c2, and operating-shaft O substantially as and for the purpose described.

4. The combination with a set of log turning and supporting devices; of two series of yielding cutter-heads arranged upon independent axes alternately upon opposite sides of the middle of the log-table, with the cutter-heads of one set alternating with those of the other set and revolving in opposite directions to cause the pull of one set of eutter-heads on the log to neutralize that of the other set substantially as and for the purpose described.

5. The combination with a set of log turning and supporting devices; of a set of yielding cutter-heads arranged upon independent axes alternately upon opposite sides of the log-table and resting against the log and following its inequalities substantially as and for the purpose described.

6. In a bark-peeling machine the combination with the log supporting and turning devices; of a horizontal shaft D2 carrying a series of rigid drive-pulleys cl2, a series of cutterheads and actuating devices consisting each of a horizontal frame D' hinged upon said shaft D2 and carrying at its end, a cutterhead D with drive-pulley d, the belt d connecting said pulleys d2 and d and springs (Z3 and Z4 arranged above and below the outer ends of the hingedframes Dl substantially as and for the purpose described.

JOllN- T. JONES. GEORGE lV. JONES. Vitnesses:

PETER E. IIARTMAN, CHARLES W. HARTMAN.

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